Yarn twisting apparatus



July 6, 1937. O w sc u s 2,085,831

YARN TWI STING APPARATUS Filed Dec. 9, 1936 INVENTOR.

O 770 W Sch/Luna. BY 25 62.4 .7 W

' ATTORNEY.

Patented July 6, 1937 Q 2,085,831 3 YARN TWISTING APPARATUS Otto w. Schlums, Whitinsville, Mass; assignor to Whitin Machine Works, Whitinsville, Mass a corporation of Massachusetts I Application December 9, 1936, Serial No. 114,956

7 8 Claims. 117-23) This invention relates to twisting apparatus of When the device is in use, the hub I8 and bushthe type in which the yarn is drawn axially ing 20 are forced down on the spindle l0 until from a rapidly revolving and positively driven the lower portion 2| of the hub I 8 is firmly seated spool or bobbin. It is necessary in such appaagainst the upper head of the spool S. A washer ratus to provide some kind of a guiding and 22 is inserted in the lower end of the hub l8 5 tensioning device to keep the yarn from contact below the bushing 20 and is held in position by with the spool head and to facilitate the unwinda spring locking ring 25 (Fig. 6) inserted in an ingof the yarn from the spool. internalannular groove in the portion 2| of the One object of my invention is to provide an hub 18.

10 improved yarn guiding and tensioning device A wire 30 is soldered or otherwise secured to 10 in such apparatus, preferably in the form of a the upper face of the washer 22 and extends traveler rotatable on a ring detachably supportradially outward through a slot 3| in the lower ed by the spindle on which the spool or bobbin hub portion 2|. Two or more wires 30 maybe is mounted. used for large rings and a corresponding num- A further object is to provide a retarding deber of equally spaced slots 3| will be provided. 15 vice for the traveler, effective only when the spin- The outer ends of the .wlre or wires 30 are curved dle and ring are at rest or are moving at reladownward as indicated in Fig. 5 and the extreme tively slow speed but inoperative at the normal lower ends 33 may be bent to form closed eyes. running speed of the spindle and spool. The normal position of the wires 30 and ends I U TED STATES PATENT OFFICE My invention u r e a es to arrangements 33 is shown in Fig. 2, with the ends 33 substan- 20 and combinations of parts which will be hereintially engaging and resting on the inner flange of after described and more particularly pointed the ring l5 and preventing free rotation of the out in theappended claims. traveler M.

A preferred form of the invention is shown in The wires 30 are formed of very light wire the drawingfin which which is highly resilient, so that as the'spindle, 25

Fig. 1 is a front elevation of twisting apparaspool and associated parts are brought up to optus embodying my invention; erating speed, centrifugal force acting on the Fig. 2 is an enlarged sectionalfront elevation wires will cause them to straighten to such of my improved structure; an extent as to raise the ends 33 out of the path 30 Fig. 3 is a view similar to Fig. 2 but showing of the traveler M, as indicated in Fig. 3. 30 the parts in difierent relation; The advantages of my improved twisting ap- Fig. 4 is a plan view of one form of the reparatus are substantially as follows:- tarding device; a During the twisting operation the ends 33 oo- Fig.5 is a side elevation thereof; and c'upy the position shown in, Fig. 3, and the trav- Fig. 6 is a plan viewiof a locking ring to beeler I4 is free to-rotate on the ring I5. It will 35 described. be understood that the rotation of the spindle Referring to Fig. 1, I have shown portions of is in the direction of the arrow at in Fig. v1 and a yarn twisting apparatus comprising a spindle is commonly at high speed. The traveler M has Hl rotatable in an upright bearing and positively only a slow forward rotation relative to the ring 40 rotated at constant speed by a belt II from any I5 and spool S, although at the same time it 40 desired driving mechanism, not shown. has a high speed actual rotation with the spin- A spool S is mounted in the usual manner on dle I0 and spool S. the spindle l0, and the yarn Y is drawn upward The actual-speed of rotation of the traveler I 4 from the spool S through a, fixed yarn guide l2 only exceeds the speed of the spool S enough to by winding mechanism, not shown. permit the necessary unwinding of the yarn from In its upward travel, the yarn Y passes through the spool S as the yarn is drawn upward through a traveler I 4 freely slidable on the flanged lower the guide eye l2. Consequently, while the travportion of an inverted ring IS. The ring [5 is eler I4 is moved rapidly through the atmossecured to the outer lower edge portion of a cap phere, it is moving relatively slowly on the I! which in turn is welded or otherwisesecured ring l5.

to a hub member I8. A bushing 20 of rubber, Apparatus of the type described is commonly cork or othersuitable material, is tightly insertused in the production of rather tight twisted ed in the hub l8 and has an axial opening adaptyarn which tends to kink or snarl if relieved of ed to receive and grip the tapered upper end of tension. When the spindle, after operation at the spindle In. high speed as above described, is abruptly 55 excessive twist by continuing its forward move--v ment and unwinding one or more turns of yarn from the spool S. If the traveler was left free to slide and rotate when the spindle stopped, this unwinding action would be facilitated by the inertia of the traveler. Even after inertia was exhausted, the traveler would offer only negligible resistance to such unwinding action.

It is at this point that the retarding device comprising the wires 30 and ends 33 comes into action. These parts being no longer displaced by centrifugal force, return promptly to their initial position indicated in Fig. 2 on the approach of the spindle to rest. In this position they project into the path of the traveler I4 and prevent further rotation of the traveler relative to thespool or spindle. Slackness of the yarn Y, together with the usual snarling or kinking of the yarn if tightly twisted, 'is thus effectively prevented.

While I have shown a spool for the yarn to be twisted, it will be understood that a cop or bobbin may be used and that the cap may be mounted on the cop or bobbin instead of directly on the spindle.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. Yarn twisting apparatus comprising a driven yarn supporting spindle, a cap on said spindle, a traveler slidably supported by said cap and freely rotatable with and also relative to said cap and spindle during a twisting operation, and means to prevent. relative rotation between said traveler and cap when said spindle and cap are substantially at rest.

2. Yarn twisting apparatus comprising a driven yarn supporting spindle, a cap on said spindle, a traveler slidably supported by said cap and freely rotatable with and also relative to said cap and spindle during a twisting operation, and means effective to prevent relative rotation of said traveler and cap when said spindle and cap are substantially at rest, said means being withdrawn from traveler-engaging position by centrifugal force during a twisting operation.

3. Yarn twisting apparatus comprising a driven yarn supporting spindle, a cap on said spindle, a traveler slidably supported by said cap and freely rotatable with and also relative to said cap and spindle during a twisting operation, and a device engaging said traveler and preventing rotation thereof relative to the cap when the cap is substantially at rest but having its engaging end slidable upwardly along the inner face of said cap and out of the path of the traveler by centrifugal force as the speed ofrotation of the spindle is increased.

4. Yarn twisting apparatus comprising a driven yarn supporting spindle, an inverted cap mounted on said spindle and having a traveler flange transversely positioned on,its lower edge, an inverted traveler suspended from and slidable relative to said flange andcap and freely'rotatable with and also relative to said cap and spindle,

and means to prevent free relative rotation of 2,086,881 brought to rest, the yarn tends to relieve the' said traveler when'said cap and spindle are substantially at rest.

5. Yarn twisting apparatus comprising a driven yarn supporting spindle, an inverted cap detachably mounted on said spindle and having a flange transversely'positioned on its lower edge,

' from and slidable relative to said flange and cap and freely rotatable with and also relative to said cap and spindle, and means to prevent free relative rotation of said traveler when said spindle and cap are substantially at rest, said means comprising a resilient and substantially radial traveler-engaging arm rotatable with said cap and having the end thereof normally closely adjacent said flange but slidable upward against the up-curved inner face of said cap from travelerengaging position by centrifugal force as the spindle speed increases.

7. Yarn twisting apparatus comprising a driven yarn supporting spindle, an inverted cap detachably mounted on said spindle and having a flange transversely positioned on its lower edge, an inverted traveler suspended from and slidable relative to said flange and cap and freely rotatable with and also relative to widow and spindle, and means to prevent free relative rotation of said travelerjwhen said spindle and cap are substantially at rest, said means comprising a resilient and substantially radial traveler-engaging arm rotatable with said cap and having the end thereof normally closely adjacent said flange and having the intermediate portion thereof normally spaced from the up-curved inner surface of said cap but movable toward said inner surface by centrifugal force as the spindle increases, thereby lifting the end of said arm above travel er-engaging position.

8. Yarn twisting apparatus comprising a driven yarn supporting spindle, an inverted capdetachably mounted on said spindle above the yarn and having a flange transversely positioned on its lower edge, an inverted traveler suspended from and slidable relative to said flange and cap and freely rotatable with and also relative to said cap and spindle, and means toprevent free relative rotation of said traveler when said spindle and cap are substantially at rest, said meanscomprising resilient and substantially radial arms rotatable with said cap and having the ends thereof normally substantially engaging said flange but slidable upward against the up-curved inner face of said cap from traveler-engaging position by centrifugal force as the spindle speed increases, said arms being equally spaced angularly about the axis of said cap.

O'I'IO W. SCHLUMS. 

